Question

我已经构建app android使用http客户端从URL获取内容，

         String getRequest(String SUrl){
             String vResult = "TEST";
        //SUrl result of "http://mydomain.com/file.php?var=21"
            HttpClient client = new DefaultHttpClient();
            HttpGet request;            
            try{                
                request=new HttpGet(SUrl);
                HttpResponse response = client.execute(request);


                vResult=request(response);

            }catch(Exception ex){
                Log.e("From Server", ex.getMessage());

            }
            return vResult;
        }

        public static String request(HttpResponse response){
            String result = "";
            try{
                InputStream in = response.getEntity().getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                StringBuilder str = new StringBuilder();
                String line = null;
                while((line = reader.readLine()) != null){
                    str.append(line + "\n");
                }
                in.close();
                result = str.toString();
            }catch(Exception ex){
                result = "Error";
            }
            return result;
        }

在android姜饼中，上面的代码工作正常从服务器获取内容，但在果冻bean中代码结果日志就像这样

java.lang.NullPointerException: println needs a message

为什么我在果冻豆中得到null，即使我已经声明了所有变量？

感谢

Answer 1

试试这个..

       catch(Exception ex){
            Log.e("From Server", ""+ex.printStackTrace());

        }

HttpClient不会在果冻豆中工作？

1 个答案: